Correct statement regarding transuranic elements is :
1. They have higher atomic number than uranium.
2. They are lighter than uranium.
3. They have lower atomic number than uranium.
4. They have same atomic number as uranium.
The correct sequence of increasing order of density is:
1. Li < K< Na < Rb < Cs
2. Li < Na < K < Rb < Cs
3. Cs < Rb < K < Na < Li
4. K < Li < Na < Rb < Cs
Eka aluminium and Eka silicon are now known as:
1. | Ga and Ge | 2. | Al and Si |
3. | Fe and S | 4. | H+ and Si |
The order of basic character of given oxides is:
1. Na2O > MgO > Al2O3 > CuO
2. MgO > Al2O3 > CuO > Na2O
3. Al2O3 > MgO > CuO > Na2O
4. CuO > Na2O > MgO > Al2O3
Which of the following exhibits variable oxidation states?
1. | Na | 2. | Cu |
3. | Mg | 4. | Al |
The lightest metal in the periodic table is:
1. H
2. Mg
3. Ca
4. Li
The electronic configuration that represents the d-block element is:
1. 1s2 2s2 2p6 3s23p63d10 4s24p6
2. 1s2 2s2 2p6 3s23p63d10 4s24p1
3. 1s2 2s2 2p6 3s23p63d10 4s2
4. 1s2 2s2 3s23p6 4s2
The most common oxidation state of cerium (Ce) is:
1. +5, +3
2. +5, +4
3. +3, +4
4. +3, +5
A common trend in both groups I and II elements in the periodic table, as the atomic number increases, is :
1. Oxidizing power increases
2. Atomic radius increases
3. Maximum valency increases
4. Reactivity with water decreases
Amongst the following electronic configurations, the highest ionization energy
is represented by:
1. [Ne]3s23p3
2. [Ne]3s23p2
3. [Ar]3d104s24p3
4. [Ne]3s23p1